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New Research Indicates That Popular Diabetes Drug Could Impact Brain Development During Pregnancy

March 31, 2024
in Science
New Research Indicates That Popular Diabetes Drug Could Impact Brain Development During Pregnancy
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Prescription Medicine Concept

Research indicates that metformin, while beneficial for pregnant animals, might not positively affect their offspring, underscoring the complexity of managing gestational diabetes risks and the importance of pursuing preventive strategies.

As cases of gestational diabetes and metabolic disorders increase during pregnancy, the prescription of metformin has become more common. Despite understanding that this oral antidiabetic medication can pass through the placental barrier, its effects on a child’s brain development remain largely unclear. However, a cross-disciplinary team from the German Institute of Human Nutrition Potsdam-Rehbrücke (DIfE) has recently shown in a mouse study that while metformin benefits pregnant animals, these positive effects do not extend to their offspring.

The results were published in the specialist journal Molecular Metabolism.

Current figures show that around one in six pregnant women worldwide are affected by a special form of diabetes known as gestational diabetes. According to the Robert Koch Institute, 63,000 women in Germany were affected by the disease in 2021, and the trend is increasing.
These numbers are alarming because excessively high blood sugar levels during pregnancy are associated with negative consequences for mother and child. This increases the risk of affected women developing type 2 diabetes later on and their children have a higher risk of developing metabolic disorders and being overweight.

Long-Term Effect of Metformin on Offspring is Unclear

For several years, the placenta-crossing oral antidiabetic agent metformin has been increasingly gaining importance as an alternative to insulin administration when lifestyle changes show no success during the treatment of gestational diabetes. However, there are currently only a few studies on the long-term effects of metformin on the health of offspring. It is known that metformin has an impact on the AMPK signaling pathway, which regulates the networking of nerve cells during brain development.

The interdisciplinary team of DIfE researchers led by Junior Research Group Leader Dr. Rachel Lippert, therefore, grappled with two central questions: Is metformin treatment only beneficial for the mother or also the child? And does metformin treatment lead to long-term negative physiological changes in the offspring, especially in connection with the development of neuronal circuits in the hypothalamus, a critical region in the regulation of energy homeostasis?

Mouse Models Shed Some Light

To answer the key questions, the researchers used two mouse models to represent the main causes of gestational diabetes:

severe obesity of the mother before pregnancy and excessive weight gain during pregnancy. These metabolic states were achieved by means of different feeding patterns, with the mice receiving either a high-fat or control diet. The antidiabetic treatment of female mice and their offspring took place during the lactation period as this corresponds to the third trimester of a human pregnancy in terms of brain development.

Treatment involved insulin, metformin, or a placebo, whereby the dosage was based on standard human treatments. The research team collected data on the body weight of the mice, analyzed various metabolic parameters and hormones, and examined molecular signaling pathways in the hypothalamus.

Maternal Metabolic State is Crucial

“As a result of antidiabetic treatment in the early postnatal period, we were able to identify alterations in the weight gain and hormonal status of the offspring, which were critically dependent on the metabolic state of the mother,” explains Lippert. Furthermore, sex-specific changes in hypothalamic AMPK signaling in response to metformin exposure were also observed. Together with the metformin-induced shift in the examined hormone levels, the results indicate that the maternal metabolic state must be taken into account before starting the treatment of gestational diabetes.

Focusing on Prevention

According to Rachel Lippert, treatment of gestational diabetes in the future could entail developing a medication that is available for all and does not cross the placenta. “Given the increasing prevalence, education about gestational diabetes and preventive measures are of vital importance. If we can find a way to manage lifestyle and diet more proactively, we are in a better position to exploit the potential of gestational diabetes treatment,” says Lippert.

Reference: “Developmental metformin exposure does not rescue physiological impairments derived from early exposure to altered maternal metabolic state in offspring mice” by Lídia Cantacorps, Jiajie Zhu, Selma Yagoub, Bethany M. Coull, Joanne Falck, Robert A. Chesters, Katrin Ritter, Miguel Serrano-Lope, Katharina Tscherepentschuk, Lea-Sophie Kasch, Maya Paterson, Paula Täger, David Baidoe-Ansah, Shuchita Pandey, Carla Igual-Gil, Annett Braune and Rachel N. Lippert, 23 December 2023, Molecular Metabolism.
DOI: 10.1016/j.molmet.2023.101860

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Copyright for syndicated content belongs to the linked Source : SciTechDaily – https://scitechdaily.com/new-research-indicates-that-popular-diabetes-drug-could-impact-brain-development-during-pregnancy/

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